4570 missfires

[condor bravo]

You still haven't said whether you were using pistol or rifle primers for the six rounds but using pistol primers is what you seem to indicate, so we're all assuming you did use pistol primers and that is where the problem lies. There is nothing to blame the Starline brass for; it was expecting large rifle primers.

 

[stubbicatt]

If you insist on using large pistol primers, if indeed that's what you are doing, you might consider seating the primer over a sheet of single ply TP. The primer pocket sized wad of TP will be punched out of the square of tissue, and seat firmly on the bottom of the primer pocket. Scott brand works good, and a roll will last the rest of your life in this application, heck probably "the other," intended, application as well. I'd reckon several hundred under primer wads in one square of TP. Its an under primer wad, and might give you just the little bit of "deck height" needed to make the pistol primers reliable.

Some guys do this when shooting black powder cartridges, and it works for them. Just be sure to clean the primer pockets when decapping, as nobody wants stained, burned, TP in their flash hole...

 

[mehavey]

Darn !

Here I've been using barenaked LP primers in my two 45-70 & 45-120 Sharps,
my 45-90 Rolling Block, my 45-70 `95Marlin, my 38-55 HighWall.... and all the
while not knowing it couldn't work in Starline brass !!!

 

[condor bravo]

Well, bottom line seems to be that pistol primers may work well for some guns but not for others. Good choice is probably to use what works well for you. If you are getting misfires with pistol primers, don't use them; easy enough to switch to the others. My .45-70 would probably work fine with pistol primers also.

 

[gyvel]

For those unaware, .45-70 revolvers were made for a number of years by the late master gunsmith/machinist Clarence M. Bates. If you run into one marked "CMB" you have a rare treasure. He also made one of a kind single shot rifles as well